![]() The -server process accepts "build requests" over HTTP, listening on localhost at the specified port. That's because the -client process does not start its own JVM. Once the -server JVM is "hot", compile times should take only a few seconds, instead of 10+ seconds. You should notice a marked difference in the time required for the script to run. Problem solved! Starting with v0.1.4, node-clojurescript offers a way to compile against a long-running, "detached" JVM server: The slow compile times mentioned above are owing to startup time of the JVM, plus the time to initially load the two underlying compilers (ClojureScript and Google Closure). Save it, then rerun ncljsc hello.cljs and point your browser to localhost:4200.ĭid it work? Cool! (maybe submit an issue if it didn't) Faster, faster! ( coll? x) ( apply array ( map clj->js x)) Here is an example of what this might look like in your project.(. Then you must configure your application’s :cljsbuild directive to compile for the :nodejs target. To run a ClojureScript app on Node.js, you must first have a Node.js runtime installed via either of the two methods described above. An application of this type can then be run with a JVM-based server such as Jetty, or it can be run on Node.js itself. Here is a sample ClojureScript application using lein-npm. If you need to disable this behavior, you can set the following config variable: $ heroku config:set SKIP_NODEJS_INSTALL=true If you need this behavior but are not using lein-npm, you can force the Clojure buildpack to install Node.js by setting the NODEJS_VERSION config variable described above. However, you can set the Node.js version with the following configuration variable: $ heroku config:set NODEJS_VERSION=4.2.1 ![]() No additional configuration is required when using lein-npm. ![]() Then it will add the deps target to your Leiningen buildpack process to ensure that all NPM packages are installed. An app that uses lein-npm will not have a package.json file, and cannot depend on the Node.js buildpack to manage dependencies.įortunately, the Clojure buildpack can detect the use of lein-npm, and will install a Node.js runtime if the plugin is found. The lein-npm plugin is a popular Leiningen plugin that supports NPM configuration directly in the project.clj file. Then NPM will install any dependencies you have in your package.json. Upon your next deployment, Heroku will run the Node.js buildpack first, which will install the Node.js runtime and NPM. Then add the file to your Git repository by running the following commands: $ git add package.json Create the package.json file in the root of your project and put the following code in it: ) to always pick up the latest version. In this file, you can define the version of Node.js to install and any dependencies your app needs. In order for the Node.js buildpack to execute, your project must also have a package.json file. This ensures Heroku will run the Node.js buildpack first, and the Clojure buildpack second. Then confirm the execution order by running this command: $ heroku buildpacks You can combine buildpacks by running the following commands: $ heroku buildpacks:clear This is useful for apps that contain a package.json file and need to run npm to manage dependencies. The Node.js buildpack can be combined with the Clojure buildpack using Heroku’s multi-buildpack support. This guide is primarily for developers who are trying to configure an existing app to build and run on Heroku. ![]() Both of these frameworks generate the necessary configuration for Heroku. If you are new to Clojure or ClojureScript and want to create an app from scratch, you should start with a framework like Luminus or Chestnut to generate a template for you. This article describes a few different ways in which Node.js can be combined with an application that uses the Clojure buildpack. ![]() Many Clojure and ClojureScript applications need a Node.js runtime during the build process or even to run an app. Using Node.js to run ClojureScript apps. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |